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| Titel |
Progress in turbulence detection via GNSS occultation data |
| VerfasserIn |
L. B. Cornman, R. K. Goodrich, P. Axelrad, E. Barlow |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 5, no. 4 ; Nr. 5, no. 4 (2012-04-23), S.789-808 |
| Datensatznummer |
250002779
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| Publikation (Nr.) |
 copernicus.org/amt-5-789-2012.pdf |
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| Zusammenfassung |
| The increased availability of radio occultation (RO) data offers the ability
to detect and study turbulence in the Earth's atmosphere. An analysis of how
RO data can be used to determine the strength and location of turbulent
regions is presented. This includes the derivation of a model for the power
spectrum of the log-amplitude and phase fluctuations of the permittivity (or
index of refraction) field. The bulk of the paper is then concerned with the
estimation of the model parameters. Parameter estimators are introduced and
some of their statistical properties are studied. These estimators are then
applied to simulated log-amplitude RO signals. This includes the analysis of
global statistics derived from a large number of realizations, as well as
case studies that illustrate various specific aspects of the problem.
Improvements to the basic estimation methods are discussed, and their
beneficial properties are illustrated. The estimation techniques are then
applied to real occultation data. Only two cases are presented, but they
illustrate some of the salient features inherent in real data. |
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